CN107896383A - The wireless communications method copied for four table collection - Google Patents
The wireless communications method copied for four table collection Download PDFInfo
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- CN107896383A CN107896383A CN201710930637.4A CN201710930637A CN107896383A CN 107896383 A CN107896383 A CN 107896383A CN 201710930637 A CN201710930637 A CN 201710930637A CN 107896383 A CN107896383 A CN 107896383A
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- child node
- frequency
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- 230000006854 communication Effects 0.000 title claims abstract description 60
- 238000004891 communication Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000001360 synchronised effect Effects 0.000 claims abstract description 17
- 238000000638 solvent extraction Methods 0.000 claims abstract description 6
- 230000002123 temporal effect Effects 0.000 claims abstract description 6
- 230000004044 response Effects 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- -1 electricity Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 238000012217 deletion Methods 0.000 claims 1
- 230000037430 deletion Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 230000006855 networking Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
- H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of wireless communications method for being used for four table collection and copying, main station system distributes on-net location to child node, wherein on-net location is according to frequency domain and temporal partitioning, multiple Frequency points of the frequency domain including dominant frequency point, frequency using Frequency point as child node, dominant frequency point is as network operation frequency, one period T is divided into multiple periods, each period distributes to a child node as time domain, each child node distributes a communication channel according to frequency and time domain, then is each one broadcast time domain of frequency point allocation；Child node carries out timing after time synchronized broadcasting command is received, and child node timing to channel time, child node is entered enters row data communication with host node, and the communication channel of remaining child node enters silent status.By the division of frequency domain and time domain, time and frequency that each child node and host node are communicated are fixed, and may be at standby mode in other frequencies and time domain child node, it is not necessary to communicate, so as to reach the purpose of low-power consumption.
Description
Technical field
The present invention relates to intelligent meter data recording technical field, and in particular to a kind of wireless communications method for being used for four table collection and copying.
Background technology
With in power system power information acquisition system to the data integrated collection work of government utility such as water, electricity, warm, gas
The continuous propulsion of journey (referred to as " unification of four tables " engineering), interface convertor (hereinafter referred to as " converter ") is in centralized meter-reading system
Usage amount is constantly increasing.Water meter that how converter is fast and accurately determined to be communicated, gas meter, flow meter, heat death theory
Communication interface form, timely to data, accurate upload main station system play a key effect.In water meter, gas meter, flow meter, heat death theory
In the industry of table, generally there are the communication interface of three kinds of forms, be respectively Meter-BUS physical interfaces (writing a Chinese character in simplified form M-BUS),
RS-485 interfaces, wireless receiving and dispatching interface.
With the development of the communication technology, the transmitting range of point-to-point communication mode is more and more remote, in order to reduce child node work(
Consume, the wireless network of star structure is widely used in radio communication.Compared with mesh network, star network reduces network
The a large amount of consumption safeguarded, it reduce inter alia the expense that child node is used for network operation.Therefore, hub-and-spoke configuration real-time performance is utilized
Four table collection copy be the application research topic.
The content of the invention
The technical problem to be solved in the present invention is to provide meet low-power consumption in one, the four table collection of being used for of point-to-point communication are copied
Wireless communications method.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of channel radio for being used for four table collection and copying
Letter method, main station system radio communication frequency domain is set；Main station system is to ground in each water, electricity, gas, hotlist child node distribution net
Location, wherein on-net location multiple Frequency points of the frequency domain including dominant frequency point, Frequency point are made according to frequency domain and temporal partitioning
For the frequency of child node, a period T is divided into multiple periods, each time by dominant frequency point as network operation frequency
Section distributes to a child node and distributes a communication channel according to frequency and time domain as time domain, each child node, and the time domain is
Channel time, then be each one broadcast time domain T of frequency point allocation0；Broadcast time domain T of the host node in each frequency0It is same to send the time
Walk broadcasting command, all child nodes receive the synchronized broadcast order of host node in broadcast time domain, and child node is to receive the time same
Timing, child node timing to channel time are carried out after step broadcasting command, child node enters reception and or sending mode and master
Node enters row data communication, and the communication channel of remaining child node enters silent status.
Further, child node fails after receiving time synchronized broadcasting command more than N number of time synchronized cycle, judges
Instrument loses the frequency domain covering of host node, the on-net location of host node distribution before child node is deleted, and with network operation frequency
Point carries out reception maintenance command, until child node and host node establish the link and are allocated channel address, wherein N be more than etc.
In 5 integer.
Further, when the N number of time synchronized broadcast cycle of host node contact does not receive the data response or empty of child node
Response, then host node judges that the instrument has been disconnected and nullified in a network.
Further, when needing to access new child node, the working frequency points of main station system are arranged to network operation frequency
Point, when the frequency for newly accessing child node enters in the range of overlay network, host node forms multiple interim logical further according to temporal partitioning
Believe channel, new child node randomly chooses a temporary communication channel and communicated with host node, and host node is interim by this
Communication channel sends the command frame for including on-net location to new child node, and child node makes an immediate response and adjusted after receiving command frame
The channel of frequency to response is to be communicated.
Further, when the frequency for newly accessing child node enters in the range of overlay network, the new child node that accesses can receive master
The network Heartbeat frame that node is sent, after child node receives the frame, the host node is added if desired, then to be sent to host node
One response frame, for the response frame by entering host node in temporary communication channel, the new child node that accesses produces the random of 0-200
It is several that temporary communication channel is selected.
From above-mentioned technical proposal it can be seen that the present invention has advantages below：By the division of frequency domain and time domain, each
The time and frequency that child node and host node are communicated are fixed, and standby mould is may be in other frequencies and time domain child node
Formula, it is not necessary to communicate, so as to reach the purpose of low-power consumption；The random networking response of child node is employed, can be with efficient reality
Existing plug-and-play feature, facilitates new child node to deploy to ensure effective monitoring and control of illegal activities.
Embodiment
Main station system (being referred to as host node) can use CYW100M type wireless communication modules, complete transparent transmission (Transistor-Transistor Logic level
UART interfaces, asynchronous serial), hardware spread spectrum coding can be automatic to receive with self-defined frequency modulation mechanism, launches, preamble detection,
Client is facilitated to be embedded in the PCB of oneself.Water, electricity, gas, hotlist (being referred to as child node) use CYW100S type wireless communication modules
1. channel distribution
Main station system radio communication frequency domain is set, host node can cover 430MHz~440MHz frequency domains in the present embodiment,
Host node distributes on-net location to child node, and wherein on-net location is according to frequency domain and temporal partitioning, and frequency domain is including dominant frequency point
Multiple Frequency points, the frequency using Frequency point as child node, dominant frequency point is as network operation frequency, with 433MHz dominant frequency point
Exemplified by, can be covered by frequency modulation distance of 100kHz, then we can set 432.5MHz, 432.6MHz,
432.7MHz, 432.8MHz, 432.9MHz, 433.1MHz, 433.2MHz, 433.3MHz, 433.4MHz, 433.5MHz frequency
As data communication channel frequency, the basic frequencies of 433MHz are as network operation frequency.
One period T is divided into N number of period, is followed successively by T1、T2、T3、、Tn, each period distributes to one
Child node distributes a communication channel as time domain, each child node according to frequency and time domain, and the time domain is channel time, then for
Each one broadcast time domain T of frequency point allocation0；
Network address allocation table
| T1 | T2 | T3 | …… | Tn | |
| 432.5MHz | Child node 1 | Child node 2 | Child node 3 | …… | Child node n |
| 432.6MHz | Child node n+1 | Child node n+2 | Child node n+3 | …… | Child node 2n |
| 432.7MHz | Child node 2n+1 | Child node 2n+2 | Child node 2n+3 | …… | Child node 3n |
| …… | …… | …… | …… | …… | …… |
| 433.5MHz | Child node 9n+1 | Child node 9n+2 | Child node 9n+3 | …… | Child node 10n |
By the division of frequency domain and time domain, time and frequency that each child node and host node are communicated are fixed,
Other frequencies and time domain child node may be at standby mode, it is not necessary to communicate, so as to reach the purpose of low-power consumption.
2nd, the communication of host node and child node
Host node sends time synchronized broadcasting command in the broadcast time domain of each frequency, and all child nodes connect in broadcast time domain
The synchronized broadcast order of host node is received, child node carries out timing, child node timing after time synchronized broadcasting command is received
To channel time, child node enter receive and or sending mode and host node enter row data communication, the communication of remaining child node
Channel enters silent status.
After failing to receive time synchronized broadcasting command in more than the 5 time synchronized cycles of instrument, judge that instrument loses master
The frequency domain covering of node, the on-net location that host node distributes before instrument is deleted, and reception dimension is carried out with network operation frequency
Shield order, until instrument establishes the link with host node and is allocated channel address.When host node contacts 5 time synchronized broadcast
Cycle does not receive the data response or null response of instrument, then host node judges that the instrument has disconnected and in a network
Nullify.Do not limit to wherein 5 cycles, operating personnel can set periodicity by programming.
3rd, the realization of the plug and play mode of new networking child node
Host node plays a leading role in the communications, and especially under master slave communication pattern, the work of host node is except data
Communication (data are uploaded and assigned), in addition to network operation.Under the communication mode, the network operation work of host node is main
Networking including child node is logined, the distribution of the frequency domain of child node and time domain address.
When needing to access new child node, the working frequency points of main station system are arranged to network operation frequency, connect when newly
The frequency for entering child node enters in the range of overlay network, and child node can receive the network Heartbeat frame that host node is sent, and child node is received
To after the frame, the host node is added if desired, then a response frame is sent to host node, and the response frame is needed in dominant frequency
Returned in channel group in point.Host node forms multiple provisional communications in network operation frequency further according to temporal partitioning to be believed
Road, the child node newly accessed randomly choose a temporary communication channel using random integers (0~200) and carried out with host node
Communication, host node send the command frame for including on-net location by the temporary communication channel to new instrument, and child node receives life
The channel for being made an immediate response after making frame and being tuned to response is to be communicated, at the same child node preserve current network host node information and
Channel information.
The purport of the communication mode does not reduce communication effect as much as possible to reduce the power consumption of communication process child nodes
Rate and overlay device quantity, and a certain degree of plug-and-play feature can be realized.Drawn by frequency rotation or time domain
Divide, can effectively realize the low power operation of child node.The random networking response of child node is employed, can be with efficient reality
Existing plug-and-play feature, facilitates new child node to deploy to ensure effective monitoring and control of illegal activities.With the development of the communication technology and communication chip, occur at present
LoRa communication (frequency modulation communication) chips, can effectively support the communication mode.
Claims (5)
- A kind of 1. wireless communications method for being used for four table collection and copying, it is characterised in that：Main station system radio communication frequency domain is set；Main station system is to each water, electricity, gas, hotlist child node distribution on-net location, and wherein on-net location is according to frequency domain and time domain Division, multiple Frequency points of the frequency domain including dominant frequency point, the frequency using Frequency point as child node, dominant frequency point are tieed up as network Frequency is protected, a period T is divided into multiple periods, each period distributes to a child node as time domain, each Child node distributes a communication channel according to frequency and time domain, and the time domain is channel time, then is each one broadcast of frequency point allocation Time domain T0；Broadcast time domain T of the host node in each frequency0Time synchronized broadcasting command is sent, all child nodes receive in broadcast time domain The synchronized broadcast order of host node, child node carry out timing after time synchronized broadcasting command is received, and child node timing is extremely Channel time, child node enter receive and or sending mode and host node enter row data communication, the communication of remaining child node is believed Road enters silent status.
- 2. the wireless communications method according to claim 1 for being used for four table collection and copying, it is characterised in that：Child node is more than N The individual time synchronized cycle fails after receiving time synchronized broadcasting command, judges that instrument loses the frequency domain covering of host node, sub- section The on-net location that host node distributes before point deletion, and reception maintenance command is carried out with network operation frequency, until child node Established the link with host node and be allocated channel address, wherein N is the integer more than or equal to 5.
- 3. the wireless communications method according to claim 2 for being used for four table collection and copying, it is characterised in that：When host node contacts N Individual time synchronized broadcast cycle does not receive the data response or null response of instrument, then host node judges that the child node has lost Connect and nullify in a network.
- 4. the wireless communications method according to claim 1 for being used for four table collection and copying, it is characterised in that：When needs access newly During child node, the working frequency points of main station system are arranged to network operation frequency, when the frequency for newly accessing child node enters covering In network range, host node forms multiple temporary communication channels further according to temporal partitioning, and new child node randomly chooses one and faced When communication channel and communicated with host node, host node is sent comprising in net by the temporary communication channel to new child node The command frame of address, child node made an immediate response after receiving command frame and be tuned to response channel it is to be communicated.
- 5. the wireless communications method according to claim 4 for being used for four table collection and copying, it is characterised in that：When new access child node Frequency enter in the range of overlay network, the new child node that accesses can receive the network Heartbeat frame that host node is sent, and child node receives After the frame, the host node is added if desired, then to send a response frame to host node, the response frame is believed by provisional communication Enter host node in road, the new random number for accessing child node generation 0-200 is selected temporary communication channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710930637.4A CN107896383B (en) | 2017-10-09 | 2017-10-09 | Wireless communication method for four-meter centralized reading |
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| CN201710930637.4A CN107896383B (en) | 2017-10-09 | 2017-10-09 | Wireless communication method for four-meter centralized reading |
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| CN107896383A true CN107896383A (en) | 2018-04-10 |
| CN107896383B CN107896383B (en) | 2020-08-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109495233A (en) * | 2018-05-24 | 2019-03-19 | 杭州盈飞驰科技有限公司 | A kind of high-effective data collecting system and control method based on LoRaWAN agreement |
| CN111080998A (en) * | 2019-12-11 | 2020-04-28 | 广西电网有限责任公司 | LoRa technology-based multi-meter centralized reading control method and system |
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